Golden Pumice Gel mediums offer various grades of gritty textures which dry to hard films. To increase flexibility and adhesion, mix in other Gels or Mediums. Fine Pumice Gel is used to create fine, textured surfaces and is also useful as a ground for pastels. Coarse Pumice Gel and Extra Coarse Pumice Gel create more coarse granular textures to yield concrete-like finishes.